. >> reporter: the fbi now taking the lead in this investigation. and alameda county sheriff's deputies which actually made the arrest say there is no question what was found here was dangerous. the incident occurred here at the terminal 2 security checkpoint at the oakland international airport. authorities say 49-year-old jeffrey mcgann a 49-year-old resident of rancho palos verdes was trying to botched a flight home to l.a.x. when he attempted to pass through the security checkpoint with a very suspicious watch. >> the watch had on it a toggle switch, a series of fuses, a series of wires protruding from it, a circuit board, and the watch itself which was on incorrect time. >> reporter: it wasn't just the watch that drew authorities' attention, it was his overall behavior and an unusual alteration to his boots. >> be they also had what appeared to be a homemade cavity in there and he was very evasive on everything he was doing. >> reporter: while no actual explosives were found on mcgann, nor in his luggage, authorities say there's no question he